Rumah > Artikel > pembangunan bahagian belakang > 异常提示:Fatal error: Call to undefined function mysqli_num_row()
错误提示:Fatal error: Call to undefined function mysqli_num_row()
错误提示就如标题所示,网上也找了一圈,差不多都是说没有开启php_mysqli模块,我的wampserver环境本身已经开启,但是我还是去重新关闭在开启,结果都是一样,有一点很奇怪,网上一般都是在链接数据库的时候失败,但是我链接数据库没有提示失败,而是在使用mysqli_num_row时候出现错误
下面先上下我在查看phpinfo下mysqli下的开启情况
mysqli
MysqlI Support enabled
Client API library version mysqlnd 5.0.8-dev - 20102224 - $Id: 65fe78e70ce53d27a6cd578597722950e490b0d0 $
Active Persistent Links 0
Inactive Persistent Links 0
Active Links 0
Directive Local Value Master Value
mysqli.allow_local_infile On On
mysqli.allow_persistent On On
mysqli.default_host no value no value
mysqli.default_port 3306 3306
mysqli.default_pw no value no value
mysqli.default_socket no value no value
mysqli.default_user no value no value
mysqli.max_links Unlimited Unlimited
mysqli.max_persistent Unlimited Unlimited
mysqli.reconnect Off Off
下面是我的代码部分
<?php <br />require ('inc/config.php');<br>$page_title = '注册-CNode博客';<br>include ('inc/header.php');<br>if ($_SERVER['REQUEST_METHOD'] == 'POST') {<br> require (MYSQL);<br> $trimmed = array_map('trim', $_POST);<br> $errors = array();<br> if ($_POST['code'] != $_SESSION['code']) {<br> $errors[] = '验证码不正确!';<br> }<br> if(empty($trimmed['username'])) {<br> $errors[] = '用户名不能为空';<br> } else {<br> if (preg_match ('/^[A-Z \'.-]{5,20}$/i', $trimmed['username'])) {<br> $un = mysqli_real_escape_string ($conn, $trimmed['username']);<br> } else {<br> $errors[] = '您的用户名格式不对';<br> }<br> }<br> <br> if(empty($trimmed['email'])) {<br> $errors[] = '电子邮件地址不能为空';<br> } else {<br> if (filter_var($trimmed['email'], FILTER_VALIDATE_EMAIL)) {<br> $e = mysqli_real_escape_string ($conn, $trimmed['email']);<br> } else {<br> $errors[] = '您的电子邮件地址格式不对';<br> }<br> }<br> <br> if(!empty($trimmed['password'])) { <br> if (preg_match ('/^\w{4,20}$/', $trimmed['password']) ) {<br> if ($trimmed['password'] == $trimmed['notpassword']) {<br> $p = mysqli_real_escape_string ($conn, $trimmed['password']);<br> } else {<br> $errors[] = '登录密码和确认密码不一致';<br> }<br> } else {<br> $errors[] = '请输入有效的登录密码';<br> } <br> } else {<br> $errors[] = '登录密码不能为空';<br> } <br> if(empty($trimmed['notpassword'])) {<br> $errors[] = '确认密码不能为空';<br> }<br> <br> if (empty($errors)) {<br> // 确定电子邮件是否被使用<br> $q = "SELECT user_id FROM users WHERE email='$e'";<br> $r = mysqli_query ($conn, $q) or trigger_error("Query: $q\n<br>MySQL Error: " . mysqli_error($conn));<br> if (mysqli_num_row($r) == 0) { // 如果查询验证电子邮件地址未被使用,则注册用户<br> $a = md5(uniqid(rand(), true)); // 创建一个激活码(创建一个长度正好为32个字符的字符串)<br> $q = "INSERT INTO users (username, email, password, active, registration_date) VALUES ('$un', '$e', SHA1('$p'), '$a', NOW() )";<br> $r = mysqli_query ($conn, $q) or trigger_error("Query: $q\n<br>MySQL Error: " . mysqli_error($conn)); <br> if (mysqli_affected_rows($conn) == 1) {<br> $body = "感谢您的注册,激活您的帐户,请点击这里:\n\n";<br> $body .= BASE_URL . 'activate.php?x=' . urlencode($e) . "&y=$a";<br> mail($trimmed['email'], '确认注册', $body, 'From: [email protected]');<br> echo '<h3>感谢您的注册!一封确认邮件已经发送到您的邮箱。请在该电子邮件中单击链接,以激活您的帐户。</h3>';<br> exit();<br> } else { <br> echo '<p>用户注册失败,为此我们表示抱歉,请在注册一次</p>';<br> } <br> } else { // 查询验证出来的电子邮件地址已经被注册<br> echo '<p>电子邮件地址已经被注册</p>';<br> }<br> } else {<br> foreach ($errors as $msg) { // Print each error.<br> echo " - $msg<br>\n";<br> }<br> }<br> mysqli_close($conn);<br>}<br>?><br><br><div> <br> <div> <a>主页</a> > 注册</div> <br> <div> <br> <form> <br> <p><br> <label>用户名:</label><input>" /><br> <span>限5~20个字符,可用中文、英文、数字及“_”、“-”组成</span><br> </p> <br> <p><br> <label>电子邮件:</label><input>" /><br> <span>请填写您的常用邮箱,它是您激活帐号和找回密码的凭证!</span></p> <div class="clear"> </div> </form> </div> </div>